Jack attachment



W. S. PINE JACK ATTACHMENT Ndv. 15, 1949 Filed Oct. 22, 1945 INVENTOR.zz/zzzzmatfipw Patented Nov. 15, 1949 UNITED STATES PATENT OFFICE JACKATTlQCHMENT William S. PineJlosAngeles, Calif. Application October 22,1945, Serial No. 623,708

r 3 Claims. (01. 29-252) My invention relates to jacks, and particularlyto an. attachment for jacks for separating one member from another.

- One of the principal objects of this invention is to provide a jackwhich may be used as an arbor press, and whereby a shaft or othercentral member may bereadily forced from a wheel, or other member,mounted on or secured to the shaft or other member.

Another important object of this invention is to provide an attachmentfor a central lift jack whereby the wheel, or other member, may beraised, removed, or withdrawn from the shaft or other central member.

An important-object also of this invention is to provide an attachmentfor a hollow central lift jack forperformingthe above function.

A further important object of this invention is to provide an attachmentof this class whereby the wheel, or other similar member, may be readilygripped, by one member of a jack, adjacent to or immediately around theshaft which is to be removed or forced therefrom by another member ofthe jack. 7 v V A still further object of this invention is to providean attachment of this class whereby the Wheel, or other member, may bereadily gripped at its peripheral portion for performing such function.

Still another object of this invention is to provide an attachment ofthis class for jacks which is relatively simple and economical ofconstruction, durable, and which may be readily applied to the jack andto the work or members to be separated.

With these and other objects in view, as will appear hereinafter, I havedevised a jack, or an attachment for jacks, having certain novelfeatures of construction, combination, and arrangement of parts andportions, as will be hereinafter described in detail and particularlyset forth in the appended claims, reference being had to theaccompanying drawings and to the characters of reference thereon, whichform a part of this application, in which:

Fig. 1 is a sectional elevation of a hydraulic jack incorporating myinvention in one form, a portion being shown in section to facilitatethe illustration;

Fig. 2 is a transverse sectional view thereof, taken through 2-2 of Fig.1; and

Fig. 3 is a fragmentary sectional elevational view of a slightlymodified form of construction.

The jack shown in Fig. 1 is a hydraulic jack, shown in one form in mycopending patent application, Serial No. 572,309. It consistsessentially' of an outer cylinder or jack member I, which supports thejack, and an inner cylinder or jack member 2 which is telescopicallymounted within and which is raised with respect to the jack member I byfluid 3 within the latter. Axially located within the'jack is a lift rod4, the upper end of which is supported on a washer or plate 5 resting onthe upper end of the inner jack member 4. Raising of the inner jackmember causes the rod to be lifted for raising or moving objectsupwardly toward or with respect to the bottom or base of the jack memberI.

The improvements of my present invention, which are located below thenormal base of the jack, consist of a normally stationary member I I anda movable member I2. When it is desired to drive the shaft 2| from awheel or gear 22, or the like, the stationary member II is placed, by anintermediate member I3, in the form of a stud or drift, against the endof the shaft 2 I. The stationary member II is in the form of a hollowcylinder, the upper end of which has a head I l positioned against thebottom of the jack memberfl, and a hole II b in the center of the headthrough which the rod 4 extends. This rodalso locates the jack withrespect to the member II. The lower end of the cylindrical member II hasa cross-bar II in the middle of which is screwed the reduced and flangedupper end of the stud I3.

The movable member I2 is also a hollow cylindrical member which isaxially mounted and movable within the cylindrical member I I. Themember I2 also has a head I2 into which the lower end of the rod 4 isscrewed. The diametrically opposite sides of the member I2 havelongitudinal slots I2 through which the bar I I extends, thus furtherguiding the members II and I2 with respect to each other in theirreciprocal movement.

The stud I3 extends through a hole in the head I2 at the lower end ofthe member I 2.

The member I2 has at its lower end external threads I2 which in thisinstance are screwed into a hole in the wheel member 22 immediatelyaround the shaft 2|, thereby gripping the wheel, or other member. Normaloperation of the jack causes the wheel, or other member 22, to be raisedagainst the shaft 2 I, and thereby driving the shaft therefrom.

In the modified structure shown in Fig. 3, the stationary member 3 I,corresponding to the member II in the first described structure, has thelongitudinal slots, designated 3 I, at diametrically opposite sides.Through these slots extends a cross-head 32, which is secured at itsmiddle por tion to the lower end of the rod 4. The opposite ends of thecross-head extend considerably beyond the contour of the member 3| andare provided at their end portions with a plurality of spaced holes 32.From the end portions of the cross-head depend arms 33 having at theirlower ends inwardly directed fingers or hooks 33. Each of the shanks ofthe arms also has a plurality of spaced holes 33. Thus, the arms may beadjustably secured to the cross-head by pins 34, depending upon the sizeand position of the wheel, or other member 22, around or over theperipheral portion of which the fingers 33 are desired to be hooked. Thestud I3 is positioned against the end of the shaft 2| as describedabove.

In both structures the ends of the studs or drifts 13 have centralpointed projections l3 for locating the stud against the shaft 2|.

The devices shown and described for separating the members 21 and 22 arepreferably in the form of attachments which may be easily and opera-,tively connected to a conventional jack, and particularly to the typeof jack shown.

Though I have shown and described a particular construction,combination, and arrangement of parts and portions, and a certainmodification thereof, I do not wish to be limited to the same. butdesire to include in the scope of my invention, the construction,combination, and arrangement substantially as set forth in the appendedclaims.

I claim:

1. In a tool for removing an internally threaded element from an axialshaft, the combination of: a sleeve; a stud carried by said sleeve andhaving an end adapted to abut the end of the shaft; 21 pulling memberslidable in said sleeve and over said stud and having a screw-threadedend adapted to be screwed into the element to be removed; andfluid-actuated means for sliding said pulling member in a direction awayfrom the end of the shaft so as to withdraw the element axially from theshaft.

2. In a tool for removing an internally threaded element from an axialshaft, the combination of: a sleeve having a cross-bar at one end; anabutment stud carried by said cross-bar and projecting coaxially fromsaid sleeve, said stud having an end adapted to abut the end of theshaft; a pulling member slidable in said sleeve and over said stud andhaving longitudinal openings through which said cross-bar extends, saidpulling member having an externally threaded end disposed adjacent saidend of said stud and adapted to be screwed into the element to beremoved; and. fluid-actuated means operative to slide said pullingmember in a direction away from the end of the shaft so as to withdrawthe element axially from the shaft.

3. In a tool for removing an element axially from a shaft, thecombination of a sleeve having a cross-bar at one end; an abutment studcarried by said cross-bar and projecting coaxially from said sleeve,said stud having an end adapted to abut. the end of the shaft; a pullingmember slidable in said sleeve and over said stud and havinglongitudinal openings through which said crossbar extends, said pullingmember projecting from said sleeve and having engaging means at its enddisposed adjacent said end of said stud and adapted to engage theelement; and fluid-actuated means operative to slide said pulling memberin a direction away from the end of the shaft so as to withdraw theelement axially from the shaft.

WILLIAM S. PINE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 975,467 Scott Nov. 15, 1910977,018 Kopietz a Nov. 29, 1910 1,344,510 Hilliard June 22, 19201,516,298 Iverson Nov. 18, 1924 1,584,855 Eisenhuth May 18, 19261,869,687 Hart Aug. 2, 1932 2,003,756 Nagel June 4, 1935 2,085,111McConnell June 29, 1937 2,252,036 Hummer Aug. 12, 1941

